Re: THIS_FILE' : redefinition; different storage class while changing setting from /MD to /MDD

From:

Girish <girishog@gmail.com>

Newsgroups:

microsoft.public.vc.mfc

Date:

Fri, 30 Apr 2010 00:18:55 -0700 (PDT)

Message-ID:

<fac38902-2b3e-4b42-9ba0-bb9e995426f9@o14g2000yqb.googlegroups.com>

While changing the project setting from /md to /mdd or /mt to /mtd we
should make sure that all the dependency dll and modules are in the
same form i.e in debug mode if not then we would be facing this type
of problem .
in this case we could not use some of debugging functions like
_CrtMemCheckpoint to use this type function we need to define
#define _HAS_ITERATOR_DEBUGGING 0
#define _SECURE_SCL 0

which could give some ASSERT msg which would not crash be an issue.

Regards,
Girish

On Apr 28, 10:38 pm, Hector Santos <sant9...@nospam.gmail.com> wrote:

Why do you have the

      #pragma once?

Just use this:

#ifdef _DEBUG
#define new DEBUG_NEW
#endif

I just checked something. If you have to use CrtMemCheckpoint, then
you are not MFC ready.

I have a lot of test and design code that are console only, where I
will isolate a new class and do rapid development and testing under my
programmer editor.

To use the crtdbg.h, here is an example test code using this crtdbg
facility:

---------------------- CUT HERE --------------------------
// File: testurl.cpp
//
// cl testurl.cpp /W3 /EHsc /MDd /D /Zi /Od /D "WINVER=0x500"
// /D "WIN32" /D "_DEBUG" /D "_WINDOWS"
// /FR /link /debug
//

#include <stdio.h>
#include <windows.h>

#ifdef _DEBUG
#define _CRTDBG_MAP_ALLOC
#include <crtdbg.h>
#endif

#include "url.cpp" // new URL parser

void ParseUrl(const char *str)
{
    URL *url = urlparse(str);
    printf("- %4s URL: %s\n", url?"GOOD":"BAD", str);
    if (url) urlfree(url);

}

void main(char argc, char *argv[])
{
#ifdef _DEBUG
    _CrtMemState memstate1;
    _CrtMemState memstate2, memdiff;

    // Send all reports to STDOUT
    _CrtSetReportMode( _CRT_WARN, _CRTDBG_MODE_FILE );
    _CrtSetReportFile( _CRT_WARN, _CRTDBG_FILE_STDOUT );
    _CrtSetReportMode( _CRT_ERROR, _CRTDBG_MODE_FILE );
    _CrtSetReportFile( _CRT_ERROR, _CRTDBG_FILE_STDOUT );
    _CrtSetReportMode( _CRT_ASSERT, _CRTDBG_MODE_FILE );
    _CrtSetReportFile( _CRT_ASSERT, _CRTDBG_FILE_STDOUT );

    _CrtMemCheckpoint(&memstate1);
#endif

    ParseUrl("/public/test1.php?title=special:123");
    ParseUrl("/public/test1.php?title=special/page_name");
    ParseUrl("/public/test1.php?title=special:123/page_name");
    ParseUrl("/public/test1.php?/title=special:123/page_name");

#ifdef _DEBUG
    _CrtMemCheckpoint(&memstate2);
    if ( _CrtMemDifference( &memdiff, &memstate1, &memstate2 )) {
       printf("***** MEM LEAK *******\n");
       _CrtMemDumpStatistics( &memdiff);
       _CrtMemDumpAllObjectsSince(&memdiff);
       _CrtDumpMemoryLeaks();
    }
#endif}

---------------------- CUT HERE --------------------------

Girish wrote:

Hi,
I working in finding out the memory leak in the application which wa=

developed in vc++2005. I am using _CrtMemCheckpoint function to f=

ind

out the memory leak these function will be working only when the
application is in debug mode and the project setting should in /MDD
or /MTD .
When ever I change my setting from /MD to /MDD I get a compiler error
Error 251 error C2370: 'THIS_FILE' : redefin=

ition;

different storage class
i.e error is at
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
#pragma once
static char THIS_FILE[] = __FILE__;
#endif

When I try to remove this and build I can build the application but it
crashes .
Could you please help me out what is changes I need to make to run
the application successfully.

Thanks in Advance,
Regards,
Girish

--
HLS